Question

Which of the following muscles do act involuntarily?

• A. Striated muscles
• B. Smooth muscles
• C. Cardiac muscles
• D. Both B and C

Answer 1

The correct option is D Both B and C

Striated muscles are cylindrical, unbranched, multinucleate and voluntary. These muscles are attached to bones hence, called as skeletal muscles. These muscles are under control of the conscious will.
Smooth muscles are spindle-shaped, uninucleate, unbranched and involuntary. These muscles are not under control of the conscious will.
Cardiac muscle cells are cylindrical, branched, uninucleate and involuntary. These muscles are not under control of the conscious will.